Suzuki Boulevard M50, Service Manual

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GENERAL INFORMATION 1-5
ENGINE OIL
Oil quality is a major contributor to your engine’s performance
and life. Always select good quality engine oil. Use of API SF/
SG or SH/SJ with JASO MA.
Suzuki recommends the use of SAE 10W-40 engine oil. If SAE
10W-40 engine oil is not available, select an alternative accord-
ing to the right chart.
BRAKE FLUID
Specification and classification: DOT 4

FRONT FORK OIL
Use fork oil L01 or an equivalent fork oil.
ENGINE COOLANT
Use an anti-freeze/engine coolant compatible with an aluminum radiator, mixed with distilled water only.
WATER FOR MIXING
Use distilled water only. Water other than distilled water can corrode and clog the aluminum radiator.
ANTI-FREEZE/ENGINE COOLANT
The engine coolant performs as a corrosion and rust inhibitor as well as anti-freeze. Therefore, the engine
coolant should be used at all times even though the atmospheric temperature in your area does not go down
to freezing point.
Suzuki recommends the use of SUZUKI COOLANT anti-freeze/engine coolant. If this is not available, use
an equivalent which is compatible with an aluminum radiator.
LIQUID AMOUNT OF WATER/ENGINE COOLANT
Solution capacity (total): 1 750 ml (1.85/1.54 US/Imp qt)
For engine coolant mixture information, refer to cooling system section in page 5-3.

Since the brake system of this motorcycle is filled with a glycol-based brake fluid by the manu-
facturer, do not use or mix different types of fluid such as silicone-based and petroleum-based
fluid for refilling the system, otherwise serious damage will result.
Do not use any brake fluid taken from old or used or unsealed containers.
Never re-use brake fluid left over from a previous servicing, which has been stored for a long
period.
Mixing of anti-freeze/engine coolant should be limited to 60%. Mixing beyond it would reduce
its efficiency. If the anti-freeze/engine coolant mixing ratio is below 50%, rust inhabiting perfor-
mance is greatly reduced. Be sure to mix it above 50% even though the atmospheric tempera-
ture does not go down to the freezing point.
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